PROBLEM TO BE SOLVED: To eliminate a failure generated between a cover member and a boarding operation part due to production errors or attachment errors without deterioration of productivity.SOLUTION: Mounting of a grain tank 9 on the cover member 45 is performed by engagement between front and rear engagement pieces 48, 49 equipped on the bottom of the cover member 45 and front and rear support shafts 46, 47 longitudinally arranged in the grain tank 9, and locking between front and rear locking tools 50 equipped on the top of the cover member 45 and front and rear locking shafts 36A longitudinally arranged in the grain tank 9. The front support shaft 46 includes a screwing shaft 46 in which a circular engagement groove with which the engagement piece 48 is engaged is formed at the end. A screwing part for enabling position adjustment of the engagement groove in a longitudinal direction by screwing of the screwing shaft 46 is equipped in the grain tank 9. An adjustment mechanism 55 for enabling adjustment of mounting positions in the longitudinal direction of the cover member 45 on the grain tank 9 includes the screwing shaft 46 and the screwing part.COPYRIGHT: (C)2012,JPO&INPIT【課題】生産性の低下を招くことなく、製作誤差や組み付け誤差に起因してカバー部材と搭乗運転部との間で発生する不具合を解消できるようにする。【解決手段】カバー部材45の穀粒タンク9への取り付けを、カバー部材45の下部に備えた前後の係合片48,49と穀粒タンク9に前後向きに配備した前後の支軸46,47との係合、及び、カバー部材45の上部に備えた前後の係止具50と穀粒タンク9に前後向きに配備した前後の係止軸36Aとの係止で行うように構成し、前側の支軸46を、係合片48が係合する環状の係合溝を端部に形成した螺軸46で構成し、螺軸46の螺進による係合溝の前後方向での位置調節を可能にする螺合部を穀粒タンク9に装備し、螺軸46及び螺合部により、カバー部材45の穀粒タンク9に対する前後方向での取り付け位置の調整を可能にする調整機構55を構成する。【選択図】図3
